<!DOCTYPE>
<html>
<head>
    <title>login</title>
</head>
<body>
<div class="container vertical-center">
    <a href="/chatroom">聊天室</a>
    <form action="/logoutSystem" method="post">
        <button type="submit">注销</button>
    </form>
</div>

</body>

</html>
